parse_type.hpp

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/*
 * Copyright 2008 Search Solution Corporation
 * Copyright 2016 CUBRID Corporation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */

/*
 * parse_type.hpp
 */

#ifndef _PARSE_TYPE_HPP_
#define _PARSE_TYPE_HPP_

#include "parse_tree.h"
#include <string>
class string_buffer;

/* generic types */
enum pt_generic_type_enum
{
  PT_GENERIC_TYPE_NONE,
  PT_GENERIC_TYPE_STRING, // any type of string
  PT_GENERIC_TYPE_STRING_VARYING, // VARCHAR or VARNCHAR
  PT_GENERIC_TYPE_CHAR, // VARCHAR or CHAR
  PT_GENERIC_TYPE_NCHAR, // VARNCHAR or NCHAR
  PT_GENERIC_TYPE_BIT, // BIT OR VARBIT
  PT_GENERIC_TYPE_DISCRETE_NUMBER, // SMALLINT, INTEGER, BIGINTEGER
  PT_GENERIC_TYPE_NUMBER, // any number type
  PT_GENERIC_TYPE_DATE, // date, datetime or timestamp
  PT_GENERIC_TYPE_DATETIME, // any date or time type
  PT_GENERIC_TYPE_SEQUENCE, // any type of sequence
  PT_GENERIC_TYPE_LOB, // BLOB or CLOB
  PT_GENERIC_TYPE_QUERY, // Sub query (for range operators)
  PT_GENERIC_TYPE_PRIMITIVE, // primitive types
  PT_GENERIC_TYPE_ANY, // any type
  PT_GENERIC_TYPE_JSON_VAL, // PT_TYPE_VARCHAR, PT_TYPE_VARCHAR, PT_TYPE_CHAR, PT_TYPE_NCHAR,
  // PT_TYPE_NUMERIC, DB_TYPE_SHORT, PT_TYPE_INTEGER, PT_TYPE_LOGICAL, PT_TYPE_DOUBLE,
  // PT_TYPE_BIGINT, PT_TYPE_JSON, PT_TYPE_MAYBE, PT_TYPE_NULL
  PT_GENERIC_TYPE_JSON_DOC, // PT_TYPE_VARCHAR, PT_TYPE_VARNCHAR, PT_TYPE_CHAR, PT_TYPE_NCHAR,
  // PT_TYPE_JSON, PT_TYPE_MAYBE, PT_TYPE_NULL
  PT_GENERIC_TYPE_SCALAR, // any type but set
};

const char *pt_generic_type_to_string (pt_generic_type_enum type);

/* expression argument type */
struct pt_arg_type
{
  enum
  {
    NORMAL,
    GENERIC,
    INDEX
  } type;

  union pt_arg_type_val
  {
    PT_TYPE_ENUM type;
    pt_generic_type_enum generic_type;
    size_t index; //index type

    pt_arg_type_val (pt_type_enum type)
      : type (type)
    {
    }

    pt_arg_type_val (pt_generic_type_enum enum_val)
      : generic_type (enum_val)
    {
    }

    pt_arg_type_val (size_t index)
      : index (index)
    {
    }
  } val;

  pt_arg_type (pt_type_enum type = PT_TYPE_NONE)
    : type (NORMAL)
    , val (type)
  {
  }

  pt_arg_type (pt_generic_type_enum generic_type)
    : type (GENERIC)
    , val (generic_type)
  {
  }

  pt_arg_type (size_t index)
    : type (INDEX)
    , val (index)
  {
  }

  void operator() (pt_type_enum normal_type)
  {
    type = NORMAL;
    val.type = normal_type;
  }

  void operator() (pt_generic_type_enum generic_type)
  {
    type = GENERIC;
    val.generic_type = generic_type;
  }

  void operator() (size_t index)
  {
    type = INDEX;
    val.index = index;
  }
};
typedef pt_arg_type PT_ARG_TYPE;

const char *pt_arg_type_to_string_buffer (const pt_arg_type &type, string_buffer &sb);
PT_TYPE_ENUM pt_to_variable_size_type (PT_TYPE_ENUM type_enum);

#endif // _PARSE_TYPE_HPP_